r-hGH is produced by recombinant DNA technology,it is a highly purified protein with 191 amino acid residues.The amino acid sequence of the product is identical to that of pituitary-derived human growth hormone.Biological potency is determined using a cell proliferation bioassay.We have several kinds of r-hGH products,including bulk powder,bulk solution and injection(from 2.5-18 IU per vial).We certifiy that all of our r-hGH products are qualified for USP/EUP/BP/WHO standard.Because we operate the best technics and process,our cost is the lowest of the world,so our sales price is the lowest too.